Electrical QAMarkus Friedl (HEPHY Vienna)

IPMU, 19 March 2012

Readout Chain Overview

Analog APV25 readout is through copper cable to FADCs

Junction box provides LV to front-end

19 March 2012M.Friedl (HEPHY Vienna): Electrical QA 2

1748APV25chips

Front-endhybrids

Rad-hardDC/DC

converters

Analog level translation,data sparsification andhit time reconstruction

Unified Belle IIDAQ system

~2mcoppercable

Junctionbox

~10mcoppercable

FADC+PROCUnified optical

data link (>20m)

Finesse Transmitter Board (FTB)

CO

PPER

Layer 6 Origami Ladder

5 DSSD sensors (4 rect + 1 slanted), 10 hybrids in total

6 hybrids (=connectors) read out in BW, 4 read out in FW

19 March 2012M.Friedl (HEPHY Vienna): Electrical QA 3

Testing

Option A: read out one sensor at a time APVDAQ: Needs 3 VME modules + repeaters

One set reads 4 APVs: 2 needed for p-side (6 APVs) with special cable (we can provide it) and one for n-side (4 APVs)

Option B: read out full ladder at once Reading out full ladder would require 15 APVDAQ

sets Alternative: use subset of final system (“1/20

system”) Enough to read out full ladder at once

19 March 2012M.Friedl (HEPHY Vienna): Electrical QA 4

Ladder Test

Option A APVDAQ – 4 APV input

channels Needs 3 sets to read

out one DSSD with special adapter cable

19 March 2012M.Friedl (HEPHY Vienna): Electrical QA 5

Ladder Test

19 March 2012M.Friedl (HEPHY Vienna): Electrical QA 6

FADCController

SVDBuffer

SVDBuffer

FADC

FADC

JunctionBox

JunctionBox

FTB

FTB

Hybrid Hybrid

Finesse

Finesse

4th crate3th crate

TTD

Finesse

Finesse

FTB

FTB

FADC

FADC

Bus Backplane

Bus Backplane

CLK,timing

FADCVME Crate

FADCVME Crate

DOCK

Option B Subset of Belle II SVD 1/20 test system

would be sufficient

Requires 9UVME crate

Ladder Test

19 March 2012M.Friedl (HEPHY Vienna): Electrical QA 7

Option B Exactly what

we have as a prototype system since 2007

Has been used in several beam tests

New system (with junction box instead of repeaters) is now being designed

Additional Infrastructure Test box

Closed box (light tight) with x/y stage and beta source (90Sr)

Can scan all sensors Fully automatic

operation (overnight) Laser not recommended

as it cannot reach stripsunderneath ribs

Software To be adapted for tests

and scanning19 March 2012M.Friedl (HEPHY Vienna): Electrical QA 8